:root {
  --ink: #0b1220;
  --muted: #58677e;
  --line: #dfe6f1;
  --blue: #1652f0;
  --soft: #f5f8fd;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a { color: var(--blue); }

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
}

.header-inner,
main,
.site-footer-inner {
  width: min(880px, calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 66px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 750;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand img { width: 32px; height: 32px; border-radius: 8px; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  font-weight: 600;
}

.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--blue); }

main { padding: 48px 0 64px; }

.breadcrumbs {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 12px;
}

h1 {
  max-width: 760px;
  margin: 0 0 16px;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.lede {
  max-width: 720px;
  margin: 0 0 30px;
  color: var(--muted);
  font-size: 18px;
}

h2 {
  margin: 38px 0 12px;
  font-size: 24px;
  letter-spacing: -0.03em;
}

h3 { margin: 24px 0 8px; font-size: 17px; }

p, li { color: #26364d; font-size: 15px; }

ol, ul { padding-left: 22px; }
li { margin: 7px 0; }

.notice {
  margin: 24px 0;
  padding: 14px 16px;
  border: 1px solid #c9d9f5;
  border-radius: 10px;
  background: #f3f7ff;
  color: #243c66;
  font-size: 13px;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin: 8px 8px 8px 0;
  padding: 0 18px;
  border-radius: 9px;
  background: var(--blue);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.cta.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.faq {
  margin-top: 34px;
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}

.faq summary {
  cursor: pointer;
  color: var(--ink);
  font-size: 15px;
  font-weight: 650;
}

.faq p { margin: 8px 0 0; color: var(--muted); font-size: 14px; }

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--soft);
}

.site-footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 22px 0;
  color: var(--muted);
  font-size: 12px;
}

.site-footer a { color: var(--muted); }

@media (max-width: 640px) {
  .header-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .nav { gap: 10px 14px; }
  main { padding-top: 32px; }
  .lede { font-size: 16px; }
}